Electric alarm-clock



(No Model.)

T.. P. ADAMS. ELECTRIC ALARM CLOCK.

No. 495,287. Patented Apr. 11, 1893.

INVENTOI? @ffi/(z BY W/ TNE SSE S A 770RNE Y S.

UNITED STATES PATENT OFFICE.

THOMAS P. ADAMS, OF RICO, COLORADO.

ELECTRIC ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 495,287, dated April 11, 1893.

. Application filed May 23, 1892. Serial No. 433,950- (No model.)

To aZZ whom it may concern.-

Be it known that I, THOMAS P. ADAMS, of Rico, in the county of Dolores and State of Colorado, have invented a new and Improved Electric Alarm-Clock, of which the following 1s a specification, reference being had to the annexed drawings, forming a part thereof, in which- Figure 1 is a rear elevation, partly in section, of my improved electric alarm clock. Fig. 2 is a side elevation; and Fig. 3 isa rear elevation of a modified form.

Similar letters of reference indicate corresponding parts in all the views.

The object of my invention is to construct an attachment to an ordinary alarm clock by means of which an alarm may be given by means of an electric battery and bell,the alarm to continue until the circuit is broken.

My invention consists in the construction and arrangement of parts hereinafter described and claimed. 7

.The case A, which contains the battery B, electric bell O and the electrical connections, is provided at the top thereof with a metal plate a, an insulating bar I), and an angled plate 0 extending upwardly over a portion of the upper surface of the insulating bar I). An ordinary alarm clock D, rests upon the insulating bar Z) and upon the metal plate a, and to the rear of the clock case is pivoted a lever cZ, provided with a spring catch e, which engages the winding key f of the spring alarm of the clock. Although the battery 13 and bell O are shown diagrammatically in the casing A, they need not necessarily be located within the box. The battery B is connected with the switch point g, the switch h is connected electrically with the plate a, the angled plate 0 is connected with the binding post 7; on the top of the box, and the said binding post is connected with the switch arm j. The switch point It is connected with the binding post Z, and the said binding post is connected electrically with one of the binding posts of the electric bell O, the other binding post being connected with the remaining pole of the battery B. When the alarm of the clock is let off, the turning of the lever cZ releases the catch and the lever falls, making an electric contact with the plate 0. The switch arm j being closed on the point'ia'and the switch arm h being closed on the point g, the current flows from the battery B through the point g, arm Zz, plate a, clock D, arm cZ, plate 0, through the switch arm j, point is, through the bell O, and back to the battery, giving the alarm, which continues until one or the other of the switches is opened. lVhen it is desired to give an alarm at a distant point, wires are run from the binding posts 1', Z, to a bell located where the alarm is desired, and the switch arm j is removed from the point it; then the current flows from the battery B through the point g, arm h, plate a, clock D, arm cZ, plate 0, binding post 2 to the distant bell, returningto the binding post Z back to the battery either through the bell O, as shown or directly. When it is desired to prevent the alarm, the switch arm h is removed from the point g.

In the form shown in Fig. 3, in lieu of the lever (Z, a chain is wound upon the winding arbor of the alarm, and as the alarm runs down, a weight carried by the chain on, strikes the plate 0 and completes the electric circuit, when the operation is the same as that already described.

Instead of the extra switch on the side of the box, the binding posts may be connected by switch, and where a distant bell is used, the connections may be varied to have the bells rung in parallel.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination with a case having on its upper side two contact plates and an intermediate insulating piece upon which and one of said contact plates an ordinary metallic clock is adapted to rest and an electric alarm connected with the said plates, of a circuit maker adapted to be held elevated by the winding arbor of the alarm and when released to descend upon the other contact plate and electrically connect the two plates through the medium of the clock case, substantially as described.

2. The combination with the case A, having contact plates to 0, intermediate insulating piece b, binding posts Z 6, battery B, alarm 0, switch h connected with plate a, contact, 9, connected with the battery, contact 7c, connected with post Z, and with alarm O, and the switch j connected with plate 0 and post i, of

a circuit maker adapted to be connected with and held elevated by the winding arbor of the alarm and to engage the plate a, when relfeasgd from said arbor, substantially as set ort end to the clock and provided with a catch e to engage the winding key of the alarm and hold the lever elevated until the alarm goes off and then to release the lever and permit it to drop into engagement with the other 3. The combination with thecasingcontaincontact plate and complete the circuit, subing an electric alarm, two contact plates on top of the casing in the alarm circuit, and an insulating plate adapted to support an ordinary alarm clock in connection with one of said plates, of a circuit maker comprising a lever d having means for pivoting its inner stantially as set forth.

. THOMAS P. ADAMS.

Witnesses:

JOHN VAN DYKE, J r., LoUIs HABERMANN. 

